Coiling machine



R. H. CRAMER 1,803,960

COLING MACHINE Filed Aug. 26, 1927 4 Sheets-Sheet l May 5, 1931.

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COILING MACHINE Filed Aug. 26, 1927 k4 Sheets-Sheer. 4

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HAS ATTR/VE Y Patented May 5, 1931 RAYIYIQND H. GRLAIYERfOLF NEWARK,

nnvr teaser, ,Assis-avon. 'ro een-naar. morons coalPORATION, '0F -DETRGL llfLCI-GAN, A GGR-PORTIGN GF DELAW'A-.R

, `corral-ver manina Application filed 'August 26, 1927. rSerial No. 215,633.

'This invention isf-:lates to ceiling machines and comprises all-.the yfeatures ofinovelty here- 'i-n disclosed. An obj'ectlof the invention is to provide an improved -machine for coiling a strip of material finto a continuouslhollow helix having a smooth cylindrical outer surface. Another object is to provide a coiling machine which can v:be quickly setup for making helical coils of any desi-redsizelpitch, etc. Another object .is :to provide a coiling machine in which 4rightor :left hand coils can vbe wound with a minimum requirement of specially .constructed right and lett hand coiling elements. Still yanother object is to i provideimproved feeding and guiding means i'or presentinga'strip o'fmaterial in proper relation to coiling rolls rto be coiled right or lett handed `into ycoils oi' selective sizes.

To these ends and .to improve generally upon machines .of kthe character indicated, the: invention also consistsinthe various Inatters hereinafter described andclaimed.

Cil

In .the drawings Figure 1 is a plan view of the machine Withsome partsin section and some removed.

`Figure 2 Vis la rear elevation of the driving mechanism and roll adjusting mechanism.

Figure 3 is a front view of lthe winding head and blade'deflector arranged lfor le-ft hand lcoi-ls.

Figure 4i is a iront view of the :feed frame with Athe winding -head and blade dei-lector arranged for right hand coils and the helical deiiector being removed'. y y

'Figure-5 is an end view-of a portion of the feed frame and first strip guide.

Figure-6 is an` end .view ot a portion of the feed frame and lthe last strip guide from which 4the strip is delivered to the lceiling rolls.

' Figure 7 isa plan View ofthe base portion of the .'eed frame.

Figure 8 is a section on line 8 8 of Figure ,T with one of the feed rollers and its shaft ournalled inthe feed frame, the equalizer and upper feed rollersjbeing removed.

Figure@ :is a `sectional view of the pivotal mounting fforthe collet housing and Ahelical arbor deflector.

Figure 10 is a sectional view of the equalizer andassociated parts.

Figure -11 is a side elevation of the machine with some vparts in section and some removed.

Figure 12 is a perspective view, partly in section, of the equalizer.

' Figure 13 is a perspective view of the spring plate for theequalizer.

Figure 11i is a perspective View oi the last strip guide.

Figure 15 is an end view of a helical deflector for right hand coils.

Figure 16 is a side view oi the helicalde- .tlector Y Figure 17 is a perspective view of ,the .helical deiiector showing' a strip of material being presented thereto.

The winding head comprises a iXed casting 12 supported by webs 14 from a base 16 fastened by bolts 18 at kthe corners to a base plate 2O of a main frame having extensions 22 bolted to supporting legs 24. The head (see Figure 11) has `a central bore 26 and three inclined.divergent openings 28 for roll shafts 30, each shaft having a projecting conical end forming a coiling or bending roll 82. The rolls are spaced about a common center which forms a coiling recess and the rolls are so tapered and their shafts are so inclined that they have parallel elements for line-contact Avvith an interposed coil'in process of formation, the formed coil passing endwise through the bore 26 in the head. All the rolls overhang the head witl their smaller ends exposed and projecting in the same direction. rllhe roll shafts carry bevel gears 34 driven in the same direction by an internal gear 36 having long' teeth which allow adjustment of the bevel gears andrtheir shafts to vary the `spacing of the rollsfor coils of di'erent diameters. The gear 36 is also cut externally with gear teeth 38 by which it is driven and a flange 40 of the gear is supported Afor rotation on a roller bearing l2 held inarecess ofthe gear byv a ring 114. The thrus'tof .the bevel gearing is resisted by a ball thrust bearing comprising a retaining ring 46 and balls48 which bear against the gear and against a thrust washer 50. Oil

from an oil cup 52 on a plate 54 fastened to the head is delivered through tubes 56 to the shaft bearings.

To adjust the spacing of the rolls while maintaining their' coiling relation and the shape of the coiling recess, the shafts are mounted for endwise movement. rlhey are moved by a. ring 60 having three forks 62 each of which straddles a necked down portion of one of the coiling shafts. One side of each fork abuts against a bevel gear 84 and the other side abuts against a ball thrust bearing 64 engaging a shoulder 66 on the shaft. The ring 60 has an inwardly lextending annular flange 68 engaging an outwardly extending annular flange 70 on an adjusting sleeve 7 2 which is threaded in an extension 74 of the fixed winding head. A hub 76 is keyed to the adjusting sleeve and held against the flange 68 by a ring nut 78. The hub forms a part of an adjusting wheel 80 having a. detachable handle 82 which can be inserted in any one of a series of openings 84 in the rim. By turning the wheel and hence the adjusting sleeve 7 2, the ring 60 will be moved axially and so shift the shafts endwise, the forks 62 allowing this movement without cramping of the shafts. The rolls can be ladjusted quickly at any time to set up the machine for any size of coil or to correct any inaccuracy in the size of the coil being wound. To keep track of the adjustment, a

stop pin 86, (see Fig. 2) which can be placed' in any one of a series of closely spaced openings 87 on the rim of the wheel, is arranged to engage a cooperating stop Vpin 88 on a fixed part of the machine.

lVhen coiling a strip right handed as indicated in Figures 1, 4 and 11, the strip is fed substantially tangentially to the highest roll and is bent downwardly by a flat bending surface or blade deflector 90 extending between two of the rolls and carried at the end of a blade 92 which is adjustable in a slideway in a plate 94 fastened to the head and having a tongue 95 fitting a locating notch 96 in the end of the winding head. rlhe blade is adjusted radially by a screw 98 and is slotted for a clamping screw 100. That one of the three rolls which is last engaged by the strip is shorter than the other two. Vhen winding a coil of another size, another blade 92 of proper size to lit between the rolls is used. When coiling a strip left handed, a different head is employed, the same rolls and a deflecting blade beingA arranged therein as in Figure 8 and the strip being bent upwardly. The end of the strip is tapered, as indicated in Fig. 17, to facilitate this bending and it is not necessary tobend one coil by hand. For deflecting the strip edgewise or laterally to make a helical coil. a deflector 102 having a helical fac-e 104 and a short, cylindrical stud 106 is mounted at the ends of the rolls in line with the bore 26. The tapered end of the strip is deflected laterally or edgewise by the helical face while the blade deflector 90 deflects the strip up or down. For coiling a strip left handed, a left hand helical deflector is used and for the different sizes of coils and different widths and thicknesses of strips, appropriately designed deiiectors are substituted one for the other. Each deflector 102 has a tapered shank 107 for detachable engagement with a tapered opening in an adjustable collet 108 which is held from rotation by a key 110 fastened to a collet housing 112. The collet is axially adjusted by a screw 114 threaded in the collet but the screw is held from movement other than rotation by an integral collar 116 and a hand wheel 118 which engage opposite faces of a thrust plate 120 fastened to the collet housing. A thumb screw -122 engaging a brass shoe 123 holds the collet in adjusted position such that the ldeflector 102 is located in proper alignment with the incoming strip. The vcollet housing is carried by a hinge arm 124 supported on a raised face or shelf 126 on a feed frame to be later referred to and is clamped by a gib 128. The hinge arm is pivoted by a pin to a boss 132 of the base 16 and carries a spring pressed locating pin 1.34 which is arranged to engage either of two bushings186 set in openings of a boss 138 on the base 16. The pin is actuated by a knob to move the pin against the tension of its spring 142. The collet housing can thus be swung away from the coiling rolls and off the shelf 126 to facilitate change of deflectors and to enable the coiled strip to be withdrawn from the coiling head.

The strip to be coiled is fed through guides and pushed up to the coiling or bending rolls by feed rollers set at an angle which can be adjusted to correspond to the pitch of the selected helix. A feed frame 144 having a base 146 is pivotally mounted on the base 16 by a headed screw pin 148, arcuate slots 149 for clamping bolts 150 enabling the frame to be clamped in any selected angular position. On the feed frame is a shelf 152 to which a guide plate 154 is secured by screws and dowel pins. The guide plate has` at one side a slot 156 through which the strip is fed t0 the rollers, a removable U-shaped cover plate 158 having pins 160 closing the side of the slot and guiding the strip. The strip passes rst between an upper roller 162 having a` concave face and a lower roller 164 having a convex face, both rollers being driven, not only to feed the strip but more especially to form the strip into a concavoconvex and substantially isosceles trapezoidal form in cross section which gives the strip a predisposition to make asmooth helical coil and counteracts the tendency to curl which the edges of a rectangular' strip' have when being wound. The strip then passes through a center guide plate 166 having a. slot 168 for the strip, the guide plate having a locating tongue l170 set in a slot 172 cut in the feed frame. VThe strip then passes between an upper roller 174 having a concave face and a lower roller176 havingfa convex face but the roller 176 has its face knurled alsoY while all the other rollers are smooth. The rollers 174 and 17,6 are the principal feed rollers and the knurling of the roller 176 gives it a grip on the strip. Y The knurl marks come on that side of the strip which becomes the inside of the coil and the outside of the coil -makes a smooth cylindrical surface. For left hand coils, the upper and the lower rollers are interchanged. The strip is pushed by the feed rollers througha slot 178 in a guide plate 180 removably secured on a lug 182 of lthe feed frame. A cover plate 184 closes the open side of the slot, the plate having hinge lugs 186 by which it is pivoted to a lug 188 on the feed frame. A latch plate 190 having aliandle 192 is pivot-ed'by a screw 194 to the plate 180 and is arranged to align With a notch 196 inthe cover plate 184 when letting the cover plate swing down to uncover Vthe slot. The guide plate 180 is detachable and replaceable by others having slots of dierent dimensions and location. 1he slot for this plate conforms closely to the size of the selected strip but the two preceding guide slots are large enough to receive any of the strips.

The slot 178 in the plate 180 is shown as horizontal and is located with respect to the coiling rolls so that a strip to be coiled into right hand coils of average size will nieetth-e upper coiling roll tangentially and horizontally. lVhen another size coil is to be wound and hence another thickness o f strip is fed to coiling rolls differently spaced, the guide plate 180 is replaced by another. having a slot of different depth, the slot also being inclined upwardly or downwardly towards its delivery end so that the strip will still meet the first ceiling roll substantially tangentially though not vquite horizontally. For left hand coils, the bore 26 in the left hand winding head is maintained at the same level but the reversed arrangement of the ceiling rolls requires lower strip guides and accordingly a second feed frame is then substituted for the first, this second frame being like the first in all respects except that its base plate 146 is thinner and the raised face or shelf 126 which supports the collet housing is enough higher to maintain the original level. The effect of machining off the base plate 146 so that it is thinner is to lowerall the strip guides. lt follows lthat the same strip guide plate 180 can be used for both right and left hand coils of average size but for other coil sizes, other guide plates are used, the larger andthicker coils requiring a higher and deeperslot for lright hand coils and a lower and deeper slot for left hand coils. The strip to be coiledl may kbe ,supported by any suitable reel which unvvinds as the strip passes to the 'feed rollers. llVhen the feed rollers are separated slot 156 is uncoveredythe leading Cor-advanced portion of thestrip can be introducedlaterf ally into the slot between the feed rollers. A suitable `speed for the feed rollers: is 137 R. l). M. andfor the coilingrolls 487 R. P. M. This `gives va surface speed for the feed rolls of about feet per minuteand since the coiling rolls are conical,vdifferent portions travel at .different speeds, the small ends travelling at about 45 feet per minute and Athe [large ends at about 111 feet per minute. v'illhisgives a rubbing action on the coil anditendsjto forni a smooth externalr cylindrical surface.

VEach `feed roller is keyed to the endof a shaft 200 andis secured thereon by `a vwasher 202 anda nut 204. -Each fupper shaft passes through an opening 206 inan equalizer casting 208 and is provided With` finished faces of cylindrical form running on rol-ler bear'- ings 210 which are retained in flangedouter race rings 212 set in recesses 214sinthe equalizer casting. Each shaft carries a gear ,216 abutting a collar o18 on the end ofthe shaft opposite the feed roller. The lower -fe-ed roller'shafts are journalled in a similar way in openings 220 of the -feed frame. The equalizer casting 208 hasfa central vhinge lug 222 extending into a slot223 in the feed frame where it is pivoted by a pin 224 to lugs 22,6 at the sides of the slot. The gears `on. the lower shafts mesh with thegears ontheupper shafts. The Vhinge lug ,222 is convex .transversely on the exteriorand bears against a thrust shoeg228 set ina slot 229 of the feed frame. A 'leaf spring plate 280 with downwardly extending yend lugs 123,2 is secured by dowel pins to `the .equalizer casting, lthe middle portion of .the spring plate vbein-g thereby spaced fromv the equalizer casting. A screw stud234 kpassesvdoW-n througha central opening285 in the-spring plate, through an opening 236 in the equalizer castingjand is threaded in a tapped opening 238 fintheffeed frame.l The stud :has a squared upper .end pivotally connected by a pivot pini240 .to a fork 242 having cani faces 244 to bear against thefspringplate. The forkhasan operating handle 246`by which the cam facesfare operated to put pressure on `the spring Iplat-e and so hold the equalizer ldown yieldingly. By turning the screw stud, the `desired' spacing of the feed rollers is obtained and this adjustment does not materiall afl'ect vthe `meshingof Ithe gears 216 because the pivot pin of the equalizer is placed adjacent to the gears. When the handle is turned to release the spring plate, a coil spring 248 tends'to raise the-equalizerocasting and .with it the upper 1 feed roller shafts, this spring bearing on the feed frame and against an annularshoulder at the 1upper end of a circular recess .249 1n and ,the l guide Cil the equalizer casting. The raising of the upper feed rollers allows the strip to be introduced laterally if the guide slot cover plates are removed.

The driving mechanism for the gears 216 comprises a gear 250 having a sleeve 252 journalled in a bushing in an opening 25e of the feed frame and held by a ring nut 256. The sleeve is internally splined to receive a detachable splined shaft 258 having a fork 260 at one end. The fork is universally connected by a universal shaft coupling 262 to a fork 264 on a shaft 266 driven by a sprocket wheel 268 and a sprocket chain 270. The shaft is journalled by ball bearings 272 in a bracket 2711 detachably fastened to the base plate 16. The universal joint and spline connecting enables the feed rollers to be driven in various positions of adjustment of the feed frame. A gear 276 is keyed to the shaft and meshes with an idler gear 278 journalled on a stud 280 supported in a lug of the bracket 274. The idler gear drives the gear 38 which in turn drives the coiling rolls in the winding head in a direction to coil right handed. For left hand coils which require that the coiling rolls be driven in the other direction, the idler gear is omitted and the gear 38 is driven directly by the gear 276 which is then mounted in a slightly different bracket. The gear 27 6 also drives a gear 282fkeyed to the shaft of a gear pump 284 which supplies cooling liquid to the work coiling ports. A guard 286 encloses the gears.

In operation, a strip of material having its end tapered to facilitate bending is fed through the guides by the feed rollers and is forced against the helical deflector 1011 which deflects the strip laterally while the blade deflector 90 between the first two bending or coiling rolls 32 bends the strip around the stud 106 and the rolls 82 complete the bending. The gradually increasing surface speed of the conical rolls irons out the coil. The coiled strip passes through the bore 26 in the head and the completed coil can be withdrawn endwise through the head in either direction since the helical deflector can be swung out of the way. The spacing of the rolls 32 can be quickly adjusted at any time to size the coil externally by turning the adjusting wheel and the partly formed coil can be withdrawn and testedfor size by uncovering the guide slot 178. For a coil of a different pitch or size, a new helical deflector is readily substituted and the feed frame can be swung around its pivot Lat a corresponding angle. IVhen a different size coil is to be formed the strip can still be presented tangentially to the first feed roll by changing the guide plate 180. If the coil is to be wound left handed, the coiling rolls and their associated elements are used in a left hand head and the feed rollers and associated elements y are used in a lower feed frame. 'The coiling rolls are then driven in the opposite direction by omitting the idler gear 278. The universal joint and splined driving connection to the feed rollers compensates for the different levels of the two feed frames.

I claim:-

1. In a machine of the character described, a winding head comprising a series of conical rolls having one element of each roll parallel to a common center line to form a coiling recess in which a coil is formed and moved endwise, the smaller ends of the conical rolls projecting in the same direction from the winding head, and means for feeding a strip of material into the space between the rolls; substantially as described.

2. In a machine of the character described, a winding head comprising a series of conical rolls having one element of each roll parallel to a common center line to form a coiling recess in which a coil isformed and moved endwise,means formoving the rolls simultaneously in the direction of their axes to vary the size of the coiling recess, and means for feeding a strip of material into the space between the rolls; substantially as described.

3. In a machine of the character described, a winding head comprising a series of conical rolls having one element of each roll parallel to a common center line to form a coiling recess in which a coil is formed and moved endwise, means for feeding a strip of material into the space between the rolls, and a deflector at the end of the rolls and in line with the coiling recess to deflect the strip into the recess; substantially as described.

Ll. In a-inachine of the character described, a winding head comprising a series of conical rolls having one element of each roll parallel to a common center line to form a coiling recess in which a coil is formed and moved endwise, the smaller ends of the rolls projecting in the samel direction from the head, means for driving the rolls, and means for feeding a strip of material into the coiling recess between the rolls at the smaller ends of the latter; substantially as described.

5. In a machine of the character described, a winding head comprising a series of rolls having one element of each roll parallel to a common center line to form a coiling recess open at both ends, means for feeding a strip of material into the space between the rolls, a deflector near 'one end of the rolls to deflect the strip into the recess, and a movable carrier for the deflector to enable the formed coil to be withdrawn endwise through the coiling recess; substantially as described.

6. In a machine of the character described, a winding head comprising a series of rolls having one element of each roll parallel to a common center line to form a coiling recess, means for feeding a strip of material into the space between the rolls, a deflector near one end of the rolls to deflect the strip laterally Apivoted support for lthe feeding and into the recess, and means for adjusting the defiector towards or from the recess into proper defiecting alignment with the incoming strip; substantially as described.

7. In a machine of the character described, a winding head comprising a series of rolls having one element of each roll parallel to a common center line to form a coiling recess, means for feeding a strip of material into the space between the rolls, a defiector near one end of the rolls to deflect the strip laterally into the recess, and a cylindrical stud projecting from the deilector into the space between the rolls; substantially as described.

8. In a machine of the character described, a winding head comprising a series of rolls spaced about a common center to form a coiling recess, means for driving the individual rolls around their axes, a collet, and a deflector detachably mounted on the collet at a point near the entrance to the coiling recess, said collet being capable of receiving other deflectors; substantially as described.

9. In a machine of the character described, a winding head comprising a series of rolls rotatable about .fixed axes and having one element of each roll parallel to a common center line to form a coiling recess, means for feeding a strip of material into the space between the rolls, means for moving the rolls to adjust the size of the recess, and a strip guide removably mounted on the machine and constructed and arranged to direct a selected strip substantially tangentially to one of the rolls; substantially as described.

10. In a machine of the character described, a winding head comprising a series of rolls having one element of each roll parallel to a common center line to form a coiling recess, means for feeding and guiding a strip of material into the space between the rolls, and a guiding means to vary the angle at which the strip is presented to the rolls; substantially as described.

11. In a machine of the character described, a. winding head comprising a series of rolls spaced about a common center to form a coiling recess, feed rollers for feeding a strip of material into the coiling recess, a strip guide for directing the strip to the coiling recess, the guide being open at one side to release a length of the strip laterally, and a movable closure for the open side of the guide; substantially as described.

12. In a machine of the character described, a winding head comprising a series of rolls spaced about a common center to form a coiling recess, forming rollers for imparting a concavo-convex cross section to a strip of material, and feed rollers for feeding the formed strip at an angle to the coiling recess, one of said feed rollers bein@ knurled and engaging that side of the strip which becomes the inside of the'completed coil; substantially as described. l

13E I-n-a machine ofthe character described, a seriesof rolls spaced about a common center to form a coiling recess, a head for supporting said rolls in a position to coiltfhe strip right handed, said head being removable and replaceable by alsecond'head for Vsupporting thesame r-ollsin a differ-ent position for coiling a strip left handed, and means for guiding the stripsubstantially tangentially to one of the rolls in each head; substantially as described.

145. In a machine of the character described, a Winding heady comprising a series of rolls spaced about a common center to form a coiling recess, meansfor varyingthe spacing of the rolls to adjust the size of the coiling recess, means for guiding a strip of material substantially tangentially to one of the rolls, and a removable deflecting blade for filling the space betvveenlsaid one roll and the next; substantially as described.

15. In a machine of the character described, a series of divergent shaftsv having three conical rolls spaced about a common center to form a coiling recess in which a coil is formed and guidedv endwise by the rolls, a" stationary head having divergent bearing wise to vary the spacing of the rolls without varying the shape of the coiling recess; substantially as described. I

16 Ina machine ofthe character described, a series of divergent shafts having conical rolls spaced about a common center to form a coiling recess, a stationary head having divergent bea-ring openings for the shafts, a member having a series of forks straddling the shafts, and means for moving the member to move the shafts endwise; substantially as described.

17. In a machine of the character described, a series of divergent shafts having conical rolls spaced about a common center to form a coiling recess, a stationary head having divergent bearing openings for the shafts, a. driven gear on each shaft, an internal gear for driving said shaft gears, and means for moving the shafts endwise while maintaining the driving relation of the gears; substantially as described.

18. In a machine of the character described, a series of divergent shafts having conical rolls spaced about a common center to form a coiling recess, means for feeding a strip of material to the rolls, a stationary head having divergent bearing openings for the shaft-s, the head having a central bore through which thecoiled strip passes, and means for driving the rolls; substantially as described.

19. In a machine of the character described, a series of divergent shafts having openings for the-shafts, and means for moving the shafts simultaneously endill() conical rolls spaced about a common center to forni a coiling recess, a stationary head having bea-ring openings for the shafts, and a screw threaded member engaging the head for effecting endwise adjustment of the shafts; substantially as described.

20.1n a machine of the character described, a winding head comprising a series 'of rolls having one element of each roll parallel to a common center line to form a coiling recess in which a coil is formed and moved endwise, means for directing a strip of material into the space between the rolls, means for driving each of the rolls about a fixed axis on the head to advance and bend the strip, and means engaging one edge of the incoming strip to cause the formed coil to advance Vendwise between the rolls and through the winding head; substantially as described.

2l. In a machine of the character described, a winding head comprising a series of projecting rolls spaced about a common center to form a ceiling vrecess in which a coil is formed and guided endwise away from the exposed ends of the rolls, means for driving the rolls around fixed axes, a guide for a strip of material and constructed and arranged to receive the strip laterally, a delector at the exposed ends of the rolls, and a carrier for moving the deflector towards or from the ends of the rolls; substantially as described.

In testimony whereofl hereunto aiix my signature.

RAYMOND H. GRANIER. 

